WMT: Facebook for Lawyers -- "Like" It?

As part of my monthly contributions to Web Marketing Today, I'm slowly working my way through the major social media sites. I started with LinkedIn, which has the most relevance to the most attorneys. In future months, I'll tackle Twitter. But this month, I address what is arguably the most powerful website on the planet--Facebook. Search Engines aside (i.e. Google), there is simply no website with more users and higher traffic. And, let's be honest, how can you do serious internet marketing and not be on the biggest site?